DE1903499A1 - Device for holding a tool in a machine tool - Google Patents

Description

ERNSTHIEBENSAMM
LAWYER

YeKARLSRUHEI A Q ή Ο AQQ

PCTVFF AC H. 5248 ", .- I O U O" T O CJ

Device for holding a tool in a machine tool

The invention relates to a device for holding a Tool in a machine tool.

In the German patent (P 14 77 578.1) an arrangement for changing the cutting tool in the spindle of a numerically controlled machine tool is disclosed, in which the spindle is aligned with a selected point in a tool magazine, removes a tool from it after using this tool. for machining a workpiece, it is aligned again with the mentioned selected point, the tool is reinserted into the magazine and then for receiving a further tool _; is aligned with another selected point in the tool magazine. The "spindle of the machine tool grips each tool by its shaft, ie at the _{Έχιάβ Λ} opposite its cutting end, while each tool in the magazine at its

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The cutting end is held in such a way that the '* \ end of the shaft protrudes from the magazine' and -can be picked up by the spindle. With such an arrangement ± _g - \ - es .- "er -. - "conducive that the tools in: tool magazine are held sufficiently to prevent um.ihr falling out, but only to find that they of" be removed from the tool magazine and inserted into this "the spindle, can * ^Continue": must they. Tools are held in the magazine so 'that' their protruding shafts are arranged with sufficient accuracy, so that. the spindle can "accept " ■: '■'-'_- the tools under numerical control. The tool magazine must / therefore with tool— ^; "■ _-; ~ holding devices must be provided that meet these requirements". to fill. '' - ^{'■:; ;} ". - ■ -" ■ '; / _ ' . ■ - ".;·." - "'./;-:*

The term "tool" is used here not only to designate the actual cutting tool "itself", but ^; also to designate such a 'tool together''mil;' ¹ a carrier "in which the tool is held both in the magazine a ^; ls --.- atich '---.- in the spindle". Such an arrangement of “tool and tool carrier is disclosed in German patent specification; (P 18 08 705.9).

A tool holding device according to the invention has a first part in the form of an annular member which can strap a second part onto a tool to be held, furthermore an element which is received in one of the parts and in a recess intervene in the other part «canoe;

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to hold the ¥ tool Ιπι ring-shaped member, as well as further compliant means which the element in engagement with hold the recess. When the tool is in a tool carrier is held, the recess can be provided on the tool carrier leg. Preferably there are several spring-loaded. Elements are provided which engage in the recess and thereby the tool in the annular member keep. .

With this arrangement the tool can be axially inserted into the link be introduced with the element or the elements against the effect of the compliant means are suppressed, until the aforesaid recess is aligned with the element or elements, whereupon the element or elements engage in the recess under the pressure of the resilient means, around the tool in the annular To hold the limb. The tool can be axially removed from the limb be withdrawn, the shape of the recess with the Element or the elements cooperates to 'these outwards to press, and so read the tool.

Several such tool holding devices can be provided on a tool magazine.

An exemplary embodiment of a tool holding device according to The invention is described with reference to the drawings, namely represent:

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Figure 1 is a plan view of a tool magazine, - "

Figure 2 is a plan view of a cable of the tool magazine according to Figure 1 on a larger scale, and

FIG. 3 shows a sectional view along the line III - III in FIG Figure 2.

A tool magazine 1 has a base 1A and two protruding parts 2 with four holes 3 each. Ten more holes 3A "are located in the base ¹ 1A. A lower cylindrical part of an annular tool holder member 4 is inserted into one of the holes 3 and is held therein by a grub screw which is screwed through the" protruding part 2 and in a V- lTut 6 engages on the circumference of the holding member 4.

The upper part of the holding member 4 has an inner cylindri-. see surface 7 of which four pins 8 / received in link 4, under the pressure of a spring 9 of polygonal Protrude shape. The spring 9 surrounds the member 4 and is located in a slot in the head of each pin 8; she · pushes the pen in; their ends 10 are inclined inward and arranged in a hole 11 in the holding member 4.

A tool to be held in the magazine .be- ■ consists of a shank part 12, a cutting part 13 and a protruding disk part 14 of larger diameter

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than that of the cutting part 13. The disk part 14 has a Urafangsnut 15, in which the pins 8 can engage, the diameter of the disk part Ή being slightly smaller than that of the hole formed by the cylindrical surface "7 "is limited so that the disc is received in the hole can be. The top and bottom edges of the disc part 14 are chamfered. The diameter of the cutting part 13 of the tool is slightly smaller than that of a hole in the lower 3? part of the link 4> so that the cutting part in the hole can be absorbed. The magazine 1 has a Hole 17 below hole 16 and a recess 18 in its base on.

The tool is inserted axially into the holding member 4 and when the lower chamfered edge of the disc part 14 engages the inwardly protruding ⁶¹¹ pins 8, the pins are pressed outwards against the action of the spring 9 and held outside until the groove 15 is groove aligned with the pins. Under the action of the spring, the pins then step; into the hat, and thus hold the tool in the holder, with the shaft part .t2 protruding from it. When the tool is removed from the holder, the shaft part is gripped: and: (with Be tr ach tang of Figure 2) moved upwards ., The shape äe-E $ Uit 15 works with the. End ^ de, r pens together _>; to get this out of the way, unid so di.e removal of the. Werkzaugs; to enableu ^

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As shown in Figure 1, the magazine contains 1 · only a tool holder 4 and only one tool, in practice tool holders and tools are of course also in the other holes 3 inserted. '-'

The holes 3A are also stepped and have a part smaller diameter 17A; they contain corresponding tool holders and tools with longer shanks.

The inside diameter and dimensions of the tool holder can be modified to have tools · with different to accommodate large cutting parts.

A tool holding device of the type just described can be used with particular advantage in numerically controlled machine tools, such as those in the aforementioned Patent are disclosed. .

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Claims (4)

• Claims 1. Tool holding device, characterized by a first Part in the form of an annular member (4) »one second part (H) on a tool to be held (12; 13) ι- can accommodate, one of the parts (.14) having a recess (15) and the other part (4) receives an element (8), which can engage in the recess (15) to hold the tool in the annular member (4), and through resilient means (9) which hold the element (8) in engagement with the recess (15). ■ "· 2. Tool holding device according to claim 1, characterized in that » that the tool (12, 13) is carried in a tool carrier (14) and the recess (15) on the tool carrier is provided. 3. Tool holding device according to claim 2, characterized in that several “spring loaded” elements (8) are ring-shaped are spaced around the annular member (4). 4. Tool magazine with several ring-shaped holes, marked characterized by a tool holding device according to 'one of the • Claims 1 to 3 in at least one of the holes (3A). 003835/0901 BATH ORIGINAL